package com.scm.erp.framework.utils;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.task.TaskExecutor;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.ThreadPoolExecutor;
/**
 * Spring线程池应用
 * */
@Configuration
@EnableAsync
public class AsyncConfigurationThread {
    @Bean(value = "threadPoolConfiguration")
    public ThreadPoolTaskExecutor threadPoolConfiguration(){
        ThreadPoolTaskExecutor threadPoolTaskExecutor = new ThreadPoolTaskExecutor();
        // 核心线程数：线程池创建时候初始化的线程数
        threadPoolTaskExecutor.setCorePoolSize(2);
        // 最大线程数：线程池最大的线程数，只有在缓冲队列满了之后才会申请超过核心线程数的线程
        threadPoolTaskExecutor.setMaxPoolSize(2);
        // 缓冲队列：用来缓冲执行任务的队列
        threadPoolTaskExecutor.setQueueCapacity(1);
        // 允许线程的空闲时间60秒：当超过了核心线程之外的线程在空闲时间到达之后会被销毁
        threadPoolTaskExecutor.setKeepAliveSeconds(60);
        // 线程池名的前缀：设置好了之后可以方便我们定位处理任务所在的线程池
        threadPoolTaskExecutor.setThreadNamePrefix("threadPoolConfiguration-");
        threadPoolTaskExecutor.setWaitForTasksToCompleteOnShutdown(false);
        // 缓冲队列满了之后的拒绝策略：由调用线程处理（一般是主线程）
        threadPoolTaskExecutor.setRejectedExecutionHandler(new ThreadPoolExecutor.DiscardPolicy());
        return threadPoolTaskExecutor;
    }
}
